Propeller



Feb. 23, 1943. LEF'FEL I I 2,312,254

PROPELLER Filed Feb. 25, 1941 3 Sheets-@Sheet 1 Feb Z3,' 1943. I. F LEFFEL I 2,312,254

' PROPELLER FiledFeb. 25, 1941 s Sheets-Sheet 2 nuuuuuuuuunuu Patented Feb. 23, 1943 UNITED, STATES PATENT OFFICE normals Lerfel, Baltimore, Md. Application February 25,1941, Serial No. 380,435

2 Claims. ((2. 115-32) t This invention relates to improvements in propellers for boats and vessels and has for its object to provide a device'that can be readily attached to a boat, or vessel, of any construction for propelling same, and which can be readily removed therefrom when desired.

The invention consists of the novel construction and arrangement of the parts and combination of parts hereinafter more fully setforth in the following specification and pointed out in detail in the appended claims.

In the accompanying drawings:

Figure 1 is a side elevation of my invention nates the stern of a boat to which my. inventionis applied, and 2 is a frame that is secured to and projects beyond the stern of the boat. The said frame 2 is provided with a seat. 2 for the operator. Hinged to the front of the frame 2 at .l, isa piece 8 which rests on the bottom of the boatand has a cross-piece 2 pivoted thereto at I on which the feet of the operator rests. Wires or. ropes 2 are secured to the outer ends of the cross-piece 2 and extended back and are connected to the outer ends of the cross-piece 2 which latter is pivoted at II and has a rudder ii projecting downwardly from each end thereof. The operator can guide the boat by turning the cross bar 2 back and forth with his feet. which inlturn, rocks the cross-bar 2 and turns the rudders I I, I. The propellers are operated through the medium of-the wheel i2 which is pivoted on top of the standard i2 mounted on top of the, frame 2. Cordsor wires it are secured to the outer 'ends'of the wheel l2 and extend back between the pins l and'over the pulleys i2 and down through the propeller frame II, one of said cords passingpver the pulley I. mounted on a rod l2 in the lower end of" the propeller frame l1, and

the ends of both of-the cords or wires l4 beins secured to thecross bar 22, which latter its of the propeller frame n and is up and down in said slots. A collapsible" arm 22 is pivoted to the rod l9 and has one of its joints pivoted to the sliding rod 20. On one end of thecollapsibie arm 22 is a frame 22 and on the other end a frame 24, each having slots 25 in which the ends of the arm 22 operate. The frame 22 has propeller blades 28 pivoted at 21 which normally rest against the cross rods 28 which latter hold the blades 22 in position' when pushing.

against the water, and the frame 24 has propeller blades 22 pivoted at 20 which normally rest against the cross-rods 2| which latter hold the blades 29 in position when pushing against the water. By turning the wheel i2 back and forth the rod 20 will be drawn up and downin the'slot 2!, through the medium of the cords, or wires, I4 causing the collapsible arm 22 to be extended, as shown in Figure 1 of the drawings, or collapsed as shown in Figure 2 of the draw ings. when the collapsible arm 22 is forced out to the extended position the propeller blades 22 are in their. normal or closed position and act against the water to push the boat forward, and when the arm 22 is collapsed the propeller blades *2: tilt'on theirpivots and the prop l "blades 22 close and act against the water to push the boat forward, thus the propeller blades 26 act against the water when the arm is extended and the propeller blades 29 act against the water when the arm 22 is collapsed. The frame i1 is secured to the sprocket wheel 22 and is adapted to turntherewith. The said sprocket-wheel 22 is reciprocally mounted in the frame 2 and a sprocket chain 22 connects said sprocket wheel 22 with a small sprocket-wheel 24 mounted on the front of the frame 2. A pin 25 projects from theside of the frame 2 and is adapted to project into one of the linksof chain 22 to hold the propeller frame l'l securely in position. when pulling on the chain 22 the sprocket wheel 22 is endsproieetingthroughtheslotsflintheslde revolved until it makes a one-half turn which 5 turns the propeller frame ll around in the opposite position. The action heretofore described to extend and collapse the arm 22 for drivingthe boat forward is the same for driving it backward after the propeller frame I! has been turned.

Having thus described my invention, what I claim is:

1. A propeller for boats, vessels, and the like, comprising a frame adapted to be secured to the stern of a boat, a seat secured to said frame, a I

cross piecepivoied to said frame in front of said adapted to move 7 seat, a cross pivoted to said frame back of said seat, a rudder secured. to each end of the cross piece back of said seat and extending below said frame, means connecting the ends of the said two crosspieces for controlling the movement of the rudders, a collapsible arm secured to said frame,

means for collapsing and extending said arm, and propeller blades pivotally mounted on opposite ends of said arm, the blades on one end of said arm adapted to operate against the water when said arm is extended and the propeller blades on the opposite end of said arm adapted to operate against the water when said arm is collapsed.

2. A propeller for boats, vessels and the like, comprising a frame adapted to be secured to the stern of a boat, a cross piece pivoted to said 15 psed.

frame, a rudder projecting downwardly from each end or said cross piece, means connected to said cross piece to control the movement of said rudders, a propeller frame reciprocally mounted in. and extending below, said first named frame. means for reciprocating said propeller frame, a collapsible arm secured to said propeller frame, means for collapsing and extending said arm. and propeller blades pivoted on opposite ends of said arm, the blades on one end of said arm adapted to operate against the water when said arm is extended and the propeller blades on the opposite end of said arm adapted to operate against the water when the said arm is col- FRANK LEFF'EL. 

